How Localized Are Age-Related Effects on Neuropsychological Measures?
نویسندگان
چکیده
A battery of neuropsychological tests (e.g., Wisconsin Card Sorting Test, Trail Making Test, Rey Auditory-Verbal Learning Test, Wechsler Adult Intelligence Scale--Revised Block Design, Object Assembly, and Digit Symbol tests) was administered to 259 adults ages 18 to 94 who reported themselves to be in good to excellent health. Moderate age-related declines were apparent in performance measures that could be postulated to be sensitive to damage in frontal, parietal, and temporal lobes. However, correlation-based analyses revealed that the age-related influences on the different measures were not independent. Across all variables examined, an average of about 58% of the age-related variance in a given variable was shared with that in other variables. These results indicate that only a portion of the age-related influences on many commonly used neuropsychological measures is specific and potentially localized.
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